Year	kg per PPP $ of GDP
1990	0.44470950996432884
1991	0.4680384864326873
1992	0.43368787837791534
1993	0.41918591682317025
1994	0.41024775456942986
1995	0.3960097587766506
1996	0.4040509905673261
1997	0.39775299218055343
1998	0.4232573818445841
1999	0.42584550906606383
2000	0.415616871621982
2001	0.4209641239429954
2002	0.414340469755685
2003	0.40558020841212794
2004	0.40541563795633306
2005	0.3947610629161916
2006	0.37716107793709136
2007	0.3769515097184091
2008	0.37697474628721134
2009	0.3409889723905683
2010	0.34539756548076306
2011	0.3254763339704703
2012	0.30589531076377235
2013	0.3192135366457706
2014	0.31665921005527475
2015	0.30838223315825525
2016	0.28820757020664073
2017	0.26337402608412647
2018	0.26396405475942764
2019	0.2530902725974887
2020	0.26327735533451135